Minor refinement to aliens attacking mechs text.

Changed the ambiance track(s) for engine control. There are now 4 possible tracks.
Admins can now spawn pulse rifles.
Cleaned up some more pulse rifle code.
Monkeys should not properly be able to pick up guns but not fire them outside of monkey mode.
Added sounds to biting.
Larva can no longer roar.
Aliens now have hissing sound effects. Currently unused.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@704 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/mob/living/carbon/alien/humanoid/humanoid.dm

@@ -628,6 +628,7 @@ This is all very silly and I will probably remove it in the future. /N
 		if (istype(src.wear_mask, /obj/item/clothing/mask/muzzle))
 			return
 		if (src.health > 0)
+			playsound(src.loc, 'bite.ogg', 50, 1, -1)
 			for(var/mob/O in viewers(src, null))
 				O.show_message(text("\red <B>[M.name] has bit [src]!</B>"), 1)
 			src.bruteloss  += rand(1, 3)
@@ -778,6 +779,7 @@ In all, this is a lot like the monkey code. /N
 
 	else
 		if (src.health > 0)
+			playsound(src.loc, 'bite.ogg', 50, 1, -1)
 			var/damage = rand(1, 3)
 			for(var/mob/O in viewers(src, null))
 				O.show_message(text("\red <B>[M.name] has bit []!</B>", src), 1)

code/modules/mob/living/carbon/alien/larva/emote.dm

@@ -26,10 +26,10 @@
 			if (!muzzled)
 				message = "<B>The [src.name]</B> whimpers."
 				m_type = 2
-		if("roar")
-			if (!muzzled)
-				message = "<B>The [src.name]</B> roars."
-				m_type = 2
+//		if("roar")
+//			if (!muzzled)
+//				message = "<B>The [src.name]</B> roars." Commenting out since larva shouldn't roar /N
+//				m_type = 2
 		if("tail")
 			message = "<B>The [src.name]</B> waves its tail."
 			m_type = 1
@@ -90,7 +90,7 @@
 			message = text("<B>[]</B> collapses!", src)
 			m_type = 2
 		if("help")
-			src << "choke, collapse, dance, drool, gasp, shiver, gnarl, jump, moan, nod, roar, roll, scratch,\nscretch, shake, sign-#, sulk, sway, tail, twitch, whimper"
+			src << "choke, collapse, dance, drool, gasp, shiver, gnarl, jump, moan, nod, roll, scratch,\nscretch, shake, sign-#, sulk, sway, tail, twitch, whimper"
 		else
 			src << text("Invalid Emote: []", act)
 	if ((message && src.stat == 0))

code/modules/mob/living/carbon/alien/larva/larva.dm

@@ -344,7 +344,7 @@
 		if (istype(src.wear_mask, /obj/item/clothing/mask/muzzle))
 			return
 		if (src.health > 0)
-
+			playsound(src.loc, 'bite.ogg', 50, 1, -1)
 			for(var/mob/O in viewers(src, null))
 				O.show_message(text("\red <B>[M.name] has bit [src]!</B>"), 1)
 			var/damage = rand(1, 3)
@@ -472,6 +472,7 @@
 
 	else
 		if (src.health > 0)
+			playsound(src.loc, 'bite.ogg', 50, 1, -1)
 			var/damage = rand(1, 3)
 			for(var/mob/O in viewers(src, null))
 				O.show_message(text("\red <B>[M.name] has bit []!</B>", src), 1)

code/modules/mob/living/carbon/monkey/monkey.dm

@@ -170,6 +170,7 @@
 	else
 		if ((M.a_intent == "hurt" && !( istype(src.wear_mask, /obj/item/clothing/mask/muzzle) )))
 			if ((prob(75) && src.health > 0))
+				playsound(src.loc, 'bite.ogg', 50, 1, -1)
 				for(var/mob/O in viewers(src, null))
 					O.show_message("\red <B>[M.name] has bit [src.name]!</B>", 1)
 				var/damage = rand(1, 5)